CN108662026A - Rolling bearing sealing element and rolling bearing - Google Patents
Rolling bearing sealing element and rolling bearing Download PDFInfo
- Publication number
- CN108662026A CN108662026A CN201810257396.6A CN201810257396A CN108662026A CN 108662026 A CN108662026 A CN 108662026A CN 201810257396 A CN201810257396 A CN 201810257396A CN 108662026 A CN108662026 A CN 108662026A
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- China
- Prior art keywords
- rolling bearing
- sealing
- lip
- peripheral surface
- main lip
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
- F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
In rolling bearing sealing element, maintains necessary leakproofness while mitigating resistance to sliding (torque of bearing).The sealing element (6) of rolling bearing is by core (10) and covers the elastic component (11) of the core and constitutes, fitting portion (12) is fixed on outer ring, and sealing (13) is made to be contacted with inner ring (2).The auxiliary lip (15) not contacted with the peripheral surface of inner ring (2) (2A) is prominent to the outside of sealing, and the inner circumferential side of the thick wall portion (13A) of the main lip (16) contacted with the peripheral surface (2A) of inner ring (2) inwardly protrudes.Endless groove (18) is set between main lip (16) and thick wall portion (13A), relatively thin flexible part (19) is formed in the base portion of main lip (16).By assisting lip (15), inhibit the entrance of foreign matter and/or moisture, and mitigation acts on the external pressure of main lip (16) and ensures the leakproofness of main lip.Base portion by endless groove (18) in main lip (16) forms flexible part (19), reduces the resistance to sliding of main lip.
Description
Technical field
The present invention relates to the rolling bearing sealing elements and dress that are sealed between the inner ring and outer ring to rolling bearing
Rolling bearing equipped with the sealing element.
Background technology
In rolling bearing, the foreign matters such as dust and/or moisture are externally entering and prevent from being sealed to axis in order to prevent
The leakage of internal lubricating grease is held, it includes the band sealing element axis of rolling that closed sealing element is carried out between inner ring and outer ring to have
It holds.The cricoid sealing being generally made of the containment member for the rubber system reinforced by core (inner core) with sealing element rolling bearing
Part is fixed on a side of inner ring or outer ring, and the lip of containment member is made to be contacted with another party, will be sealed between Internal and external cycle.Moreover, logical
It crosses and the lip shape etc. of containment member is designed, seek to improve leakproofness while reducing resistance to sliding (torque of bearing).
For example, in patent document 1, disclosing a kind of sealing device：It is formed on the inside of the axis direction of containment member
The main lip contacted with the peripheral surface of inner ring, is formed with the non-contact portion to form labyrinth between inner ring on the outside.
The sealing device by the labyrinth of non-contact portion, abirritation in main lip external pressure and prevent foreign matter into
Enter, additionally by making main lip be contacted with the peripheral surface of inner ring, prevents the partial wear of main lip.
Patent document 1：Japanese Unexamined Patent Publication 2006-97851 bulletins
However, in sealing device recorded in patent document 1, main purpose is the high pressure outside corresponding, so
Core is extended near the front end of main lip, in addition, the base portion of main lip is thicker and is difficult to the construction bent, so main lip with
The resistance to sliding of inner ring becomes larger, and the torque of rolling bearing becomes larger.
Invention content
The present invention is completed in view of above-mentioned aspect, and its purpose is to provide be able to maintain that necessary leakproofness simultaneously
Mitigate the rolling bearing sealing element of resistance to sliding (torque of bearing) and with sealing element rolling bearing.
In order to solve the above technical problems, the rolling bearing sealing element for the invention that technical solution 1 is related to, is to be fixed
In the outer ring of rolling bearing, the cricoid rolling bearing sealing element being sealed between inner ring and outer ring, which is characterized in that
Including：The cricoid core extended between the inner ring and outer ring, and cover at least part of elastic component of the core；
There is the elastic component sealing, the sealing to cover in the axis direction of the rolling bearing of the inner peripheral portion of the core
Inner surface and outer surface；
The sealing has a thick wall portion, the part of the outer surface of the thick wall portion than covering the core is thick and covering described in
The inner surface of core；
In the inner peripheral portion of the sealing, it is formed with：Peripheral surface relative to the inner ring has gap and discontiguous auxiliary
Lip, and in the main lip contacted with the peripheral surface of the inner ring on the inside of axis direction than the auxiliary lip；
Between the thick wall portion and the main lip of the sealing, it is equipped with the endless groove of axially inside opening, in institute
The base portion for stating main lip is formed with relatively thin flexible part.
The rolling bearing sealing element for the invention that technical solution 2 is related to, be the inner ring for being fixed in rolling bearing, to inner ring with it is outer
The cricoid rolling bearing sealing element being sealed between circle, which is characterized in that
Including：The cricoid core extended between the inner ring and outer ring, and cover at least part of elastic component of the core；
There is the elastic component sealing, the sealing to cover in the axis direction of the rolling bearing of the peripheral part of the core
Inner surface and outer surface；
The sealing has a thick wall portion, the part of the outer surface of the thick wall portion than covering the core is thick and covering described in
The inner surface of core；
In the peripheral part of the sealing, it is formed with：Inner peripheral surface relative to the outer ring has gap and discontiguous auxiliary
Lip, and in the main lip contacted with the inner peripheral surface of the outer ring on the inside of axis direction than the auxiliary lip；
Between the thick wall portion and the main lip of the sealing, it is equipped with the endless groove of axially inside opening, in institute
The base portion for stating main lip is formed with relatively thin flexible part.
The rolling bearing sealing element for the invention that technical solution 3 is related to, in the composition of above-mentioned technical proposal 1 or 2, feature exists
In：The surface in the outside in the axis direction of the rolling bearing of the front end of the auxiliary lip has gap with the auxiliary lip
And the angle of inclination between the peripheral surface of the discontiguous inner ring or the inner peripheral surface of the outer ring, than the front end of the auxiliary lip
The surface of inside in the axis direction of the rolling bearing in portion is discontiguous described interior with gap with the auxiliary lip
Angle of inclination between the peripheral surface of circle or the inner peripheral surface of the outer ring is small.
The rolling bearing sealing element for the invention that technical solution 4 is related to, in arbitrary 1 composition of above-mentioned technical proposal 1 to 3
In, it is characterised in that：The surface of inside in the axis direction of the rolling bearing of the front end of the main lip and the main lip
Angle of inclination between the peripheral surface of the inner ring or the inner peripheral surface of the outer ring of contact, than the institute of the front end of the main lip
State the peripheral surface for the inner ring that the surface in the outside in the axis direction of rolling bearing is contacted with the main lip or the outer ring
Inner peripheral surface between angle of inclination it is small.
The rolling bearing for the invention that technical solution 5 is related to, it is characterised in that：It is installed with arbitrary 1 of above-mentioned technical proposal 1 to 4
The rolling bearing sealing element.
Inhibit the foreign matters such as dust and/or moisture to inner ring by assisting lip according to the invention that technical solution 1 and 2 is related to
Enter between outer ring, and mitigate the external pressure for acting on main lip, is sealed between inner ring and outer ring by main lip.
Base portion in main lip by endless groove is arranged between the thick wall portion of sealing and main lip forms relatively thin flexible part, can subtract
The resistance to sliding of light main lip.By inner circumferential side (technical solution 1) or peripheral side (technology that discontiguous auxiliary lip is formed in core
Scheme 2), rigidity increases, and can obtain stable leakproofness.In addition, thick wall portion is arranged in the inside by the axis direction in core,
The rigidity of sealing element entirety can be improved and obtain stable leakproofness, and improve the associativity of elastic component and core.In turn,
With endless groove continuously be equipped with thick wall portion, so can prevent main lip turn over stick up and prevent can Bearing inner lubricating grease it is excessively attached
It in main lip.
According to the invention that technical solution 3 is related to, the foreign matters such as dust can be effectively inhibited and/or moisture is externally entering.
According to the invention that technical solution 4 is related to, it is outside the lubricating grease being held between inner ring and outer ring can be effectively inhibited
Portion leaks.
According to the invention that technical solution 5 is related to, it is capable of providing the band of the sealing element described in arbitrary 1 including technical solution 1 to 4
Sealing element rolling bearing.
Description of the drawings
Fig. 1 is the partial sectional view of the rolling bearing involved by an embodiment of the invention.
Fig. 2 is the sectional view of the sealing element for the rolling bearing that amplification indicates Fig. 1.
Fig. 3 is the sectional view of the sealing of the pith for the sealing element that amplification is denoted as Fig. 2.
Fig. 4 is the main lip for the sealing for indicating Fig. 3 and assists the definition graph at the angle of inclination of lip.
Fig. 5 is that amplification indicates to be installed in the institute in the torque rating experiment of the rolling bearing of present embodiment and dust test
The sectional view of the pith of the sealing element of the comparative example 1~3 used.
Fig. 6 is the skeleton diagram of the experimental rig used in the torque rating experiment of the rolling bearing of present embodiment.
Fig. 7 is the chart of the result of the torque rating experiment for the rolling bearing for indicating present embodiment.
Fig. 8 is the chart of the result of the dust test for the rolling bearing for indicating present embodiment.
Fig. 9 is the partial sectional view of the rolling bearing involved by other embodiments of the present invention.
Reference sign
1：Rolling bearing, 2：Inner ring, 3：Outer ring, 6：Rolling bearing sealing element, 10：Core, 11：Elastic component, 13：Sealing,
13A：Thick wall portion, 15：Auxiliary lip, 16：Main lip, 18：Endless groove, 19：Flexible part, H：Gap, S：Annulus, X：Rotary shaft, α
1、α2、β1、β2：Inclination angle
Specific implementation mode
Hereinafter, embodiments of the present invention are described in detail based on attached drawing.
For the rolling bearing involved by present embodiment, be illustrated in be assembled in the information communication devices such as PC and/or
The small-sized ruler of outer diameter 10mm used in the motor of household appliances, the control motor of automobile, hair-dryer, fan electromotor etc. or so
Very little ball bearing illustrates, but sealing element according to the present invention and rolling bearing be not limited to such purposes and
Size.
Fig. 1 is the partial sectional view of the rolling bearing 1 involved by present embodiment.It in the following description, will be shown in Fig. 1
The direction of rotary shaft X of rolling bearing 1 be known as axis direction, the direction vertical relative to the axis direction is known as radial direction.
As shown in Figure 1, the rolling bearing 1 involved by present embodiment is band sealing element ball bearing, including：Inner ring 2；Outer ring 3；Multiple rollings
Kinetoplast 4 (steel ball), this multiple rolling element are incorporated in the orbital plane 2B for the peripheral surface 2A for being formed in inner ring 2 and are formed in outer ring 3
Inner peripheral surface 3A orbital plane 3B between；With retainer 5, which is maintained at track by these rolling elements 4 at predetermined intervals
On face 2B, 3B.On rolling bearing 1, at its axis direction both ends, it is fixed on 3 ground of outer ring and is equipped between inner ring 2 and outer ring 3
The cricoid rolling bearing sealing elements 6,6 (hreinafter referred to as sealing element) that are sealed of annulus S.In annulus S
In, maintain the lubricating grease of appropriate amount.
The peripheral surface 2A of inner ring 2 is formed as the cylinder with certain diameter other than the orbital plane 2B of axis direction central portion
Face.At the axis direction both ends of the inner peripheral surface 3A of outer ring 3, it is circumferentially formed with the cricoid close of installation sealing element 6,6
Sealing groove 8,8.Seal groove 8 is formed to have the band step of the major diameter portion 8B of minor diameter 8A and outside on the inside of axis direction
The side wall of shape, the outside of major diameter portion 8B is formed as inclined conical surface portion 8C.In addition, the Inner peripheral portions 3C at the both ends of outer ring 3, i.e.
The diameter of the axis direction exterior portion of seal groove 8,8 forms bigger than the diameter of inner peripheral surface 3A.In addition, being arranged at rolling bearing
The sealing element 6,6 at 1 both ends is same construction, so following only detailed to a side (being in Fig. 1 the sealing element 6 on right side)
It illustrates.
With reference to Fig. 2, sealing element 6 is by metal core 10 and the elastic structure for at least part of rubber system for covering core 10
Part 11 is constituted.
Core 10 is the annular component extended in the radial direction between the peripheral surface 2A of inner ring 2 and the inner peripheral surface 3A of outer ring 3.Core
10 inner peripheral portion extends near the peripheral surface 2A of inner ring 2, and peripheral part extends to the position for the inner peripheral surface 3A for substantially reaching outer ring 3
It sets.The peripheral part of core 10 forms the cylindrical portion of the inner peripheral surface 3A along outer ring 3 by a right angle to the bending of the inside of rolling bearing 1
10A.Core 10 is inserted into elastic component 11, is around covered by elastic component 11, but from the inner peripheral surface of cylindrical portion 10A to towards
Expose to outside in region near the inner peripheral portion of that end face of the inside of rolling bearing 1.Core 10 adds elastic component 11
By force, the shape of sealing element 6 is kept relative to external force.
The elastic component 11 of sealing element 6 is the annular component for being formed as one following part：The fitting portion 12 of peripheral side,
The fitting portion of the peripheral side covers the peripheral side of core 10 and is embedded in the seal groove 8 of outer ring 3 and is fixed in outer ring 3；Inner circumferential side
Sealing 13, the inner circumferential side of the sealing covering core 10 of the inner circumferential side and a part (aftermentioned main lip 16) and inner ring 2 outside
Circumferential surface 2A contacts；And the middle part 14 between them.Fitting portion 12 has：It is embedded in the minor diameter 8A of the seal groove 8 of outer ring 3
And the stage portion 12A of major diameter portion 8B, it is embedded in the rake 12B of conical surface portion 8C, and be formed on stage portion 12A and tilt
Inclined surface 12C between portion 12B；It is embedded in the inner surface of seal groove 8 and sealing element 6 is fixed on outer ring 3.Middle part 14 covers
On the outside of the axis direction of core 10, it is connected with fitting portion 12 and sealing 13.
Next, being illustrated to the sealing 13 of elastic component 11 with reference to Fig. 3 and Fig. 4.
Sealing 13 is formed to cover the axis direction inner surface of the inner peripheral portion of core 10 and outer surface and face inner ring 2
Peripheral surface 2A.Sealing 13 has thick wall portion 13A, part of the thick wall portion than the outer surface of the core 10 in covering axis direction
Thickness, and the inner surface of the inner peripheral portion of the core 10 in covering axis direction.It is big that the peripheral surface of thick wall portion 13A is formed as 10 side diameter of core
Conical surface 13B.In the inner peripheral portion of sealing 13, on the outside of axis direction and inside, it is respectively formed with the peripheral surface 2A to inner ring 2
Auxiliary lip 15 and main lip 16 outstanding are formed with the interior of the peripheral surface 2A for facing inner ring 2 between auxiliary lip 15 and main lip 16
Circumferential groove 17.
Peripheral surface 2A of the front end of lip 15 with small gap H relative to inner ring 2 is assisted not contact.With this phase
Right, the front end of main lip 16 with defined interference volume is contacted with the peripheral surface 2A of inner ring 2.Assist lip 15 and main lip 16
Front end is formed on the inside of axis direction and the inclined section view V shape in outside.The front end of auxiliary lip 15 is configured in core 10
Radial direction on the inside of, i.e. the position of the axis direction position Chong Die with core 10.The front end of main lip 16 is formed on the axis of core 10
On the inside of direction, i.e., than thick wall portion 13A on the inside of radial direction.
As shown in Fig. 4 (A), the surface on the outside of the axis direction of lip 15 and the inclined angle alpha between the peripheral surface 2A of inner ring 2 are assisted
1, the surface on the inside of axis direction than assisting lip 15 and the angle of inclination beta 1 between the peripheral surface 2A of inner ring 2 are small.As shown in Fig. 4 (B),
Angle of inclination beta 2 between surface on the inside of the axis direction of main lip 16 and the peripheral surface 2A of inner ring 2, on the outside of the axis direction of main lip 16
Surface and the peripheral surface 2A of inner ring 2 between inclined angle alpha 2 it is small.
As shown in figure 3, being formed with endless groove 18 between the thick wall portion 13A and main lip 16 of sealing 13.18 quilt of endless groove
It is configured on the inside of the radial direction of the core 10 of sealing 13, to the axis direction inside opening of sealing 13, extends to and reach core 10
Radial direction inner circumferential side depth.Two side is formed as conical surface shape to which width narrows to bottom by endless groove 18.To lead to
The internal circle groove 17 and endless groove 18 between auxiliary lip 15 and main lip 16 are crossed, in the base portion of main lip 16, is formed with from auxiliary lip 15
The relatively thin flexible part 19 extended on the inside of lateral axis direction.The flexible part 19 is contained in the base portion of main lip 16, in radius side
The thinner wall section thinner than the thickness until from endless groove 18 to the front end of main lip 16 upwards.In the example in the figures, 16 quilt of main lip
The position consistent with the end face of the inside in the axis direction of thick wall portion 13A is extended to, but can also be extended to be more than or do not surpass
Cross the position of the position.
In this way from the main part of sealing 13 axially inside extend main lip 16 in, by via flexible part 19 with it is close
The front end of the main part connection in envelope portion 13 is contacted from radial direction with the peripheral surface 2A of the inner ring 2 of not step.According in this way
The sealing element 6 of construction can make to decline with the contact of inner ring 2 and mitigate resistance to sliding, mitigate the torque of inner ring 2.
In addition, each corner on the cross sectional shape of the elastic component 11 of the sealing element 6 of diagram, does not implement chamfering or falls
Fillet (R), but chamfering or rounded corner (R) can also be appropriately carried out in these corners.
Next the effect of the rolling bearing 1 involved by the present embodiment that constitutes as described above is illustrated.
Rolling bearing 1 by inner ring 2 and outer ring 3 support can relative rotation, the rolling for passing through rolling element 4 mitigates rotational resistance
(torque).Be sealed by the annulus S of 6,6 pairs of sealing element between inner ring 2 and outer ring 3, prevent the foreign matters such as dust and/or
Moisture prevents the lubricating grease being held in annulus S from leaking to the outside externally to entering in annulus S.
At this point, sealing element 6 by with small gap H relative to 2 discontiguous auxiliary lip 15 of inner ring, inhibit foreign matter
It is externally entering, and mitigates the external pressure for acting on main lip 16.Assist lip 15 such as shown in Fig. 4 (A), by making outside axis direction
Inclined angle alpha 1 between the surface of side and the peripheral surface 2A of inner ring 2 than surface and inner ring 2 on the inside of axis direction peripheral surface 2A it
Between angle of inclination beta 1 it is small, foreign matter and/or liquid are easy to be stranded in the smaller outside in inclination angle (1 ＜ β 1 of α), can effectively inhibit
The foreign matters such as dust and/or moisture are externally entering.In addition, auxiliary lip 15 is configured on the inside of the radial direction of core 10, core 10 prolongs
It reaches near auxiliary lip 15, so stable leakproofness can be obtained by core 10 improves rigidity.
On the other hand, main lip 16 is arranged at the sides thick wall portion 13A, but endless groove is arranged between thick wall portion 13A at it
18 and relatively thin flexible part 19 is formed in the base portion of main lip 16, thus enable that the contact of itself and inner ring 2 declines and mitigates
Resistance to sliding mitigates the torque of inner ring 2.At this point, as described above, by assisting lip 15, inhibit the foreign matters such as dust and/or moisture from
Outside enters, and reduces the external pressure for acting on main lip 16, so can ensure necessary leakproofness by main lip 16.It is main
Such as Fig. 4 (B) of lip 16 is shown, by making the angle of inclination beta 2 between the surface on the inside of axis direction and the peripheral surface 2A of inner ring 2 than axis side
Inclined angle alpha 2 between the peripheral surface 2A on surface and inner ring 2 outward is small, and liquid etc. is easy to be stranded in smaller interior in inclination angle
Side (2 ＜ α 2 of β), so the leakage for the lubricating grease being held in annulus S can be effectively inhibited.
Main lip 16 forms relatively thin flexible part 19 by endless groove 18 are arranged between thick wall portion 13A at it, improves
Flexibility, but the rigidity for improving the entirety of sealing element 6 by being arranged at the thick wall portion 13A on the inside of the axis direction of sealing 13,
So being able to maintain that stable leakproofness.In addition, continuously thick wall portion 13A is equipped with endless groove 18, so heavy wall can be passed through
Portion 13A limits the deflection of main lip 16, prevents turning over for main lip 16 from sticking up, and prevents the lubricating grease in annulus S from excessively adhering to
In main lip 16.In turn, in the case where rolling bearing 1 is the small size bearing of outer diameter 10mm or so, the plate thickness and elasticity of core 10
The wall thickness of component 11 becomes relatively thin, but by the way that thick wall portion 13A is arranged on the inside of the axis direction of sealing 13, it can be ensured that core 10
With the associativity of elastic component 11, so sealing element 6 can be easily manufactured by punch forming etc..
Next, being illustrated to torque rating experiment and dust test, these experiments are in order to the above embodiment
Rolling bearing 1 and be installed with respectively sealing element shown in Fig. 5 (A)~(C) rolling bearing (comparative example 1~3) leakproofness
It can be compared and carry out.In addition, sealing elements of the sealing element 20A~20C relative to present embodiment shown in Fig. 5 (A)~(C)
6, the only shape of inner peripheral portion is different, so in the following description, same reference numerals are suitably used for corresponding part,
Related with same part it will illustrate to omit.
Sealing element 20A shown in Fig. 5 (A) is the sealing element for the standard for being installed in rolling bearing, relative to core 10 by with
The sealing 22 being placed on the inside of axis direction, is formed with endless groove 23 on the outside of axis direction, has on the inside of axially and is bent convexly
Cross sectional shape.Sealing 22 only has the single main lip 24 contacted with the peripheral surface 2A of inner ring 2, does not have auxiliary lip 15.
Main lip 24 it is bigger than the main lip 16 of the sealing element 6 of present embodiment with the contact width of the axis direction of the peripheral surface 2A of inner ring 2.Separately
Outside, the distance between the Inner peripheral portions of core 10 and the peripheral surface 2A of inner ring 2 are more slightly larger than the sealing element 6 of present embodiment.Below will
The rolling bearing that sealing element 20A shown in Fig. 5 (A) is installed in axis direction both sides is known as " comparative example 1 ".
Sealing elements 6 of the sealing element 20B relative to present embodiment shown in Fig. 5 (B), the thick wall portion 13A of sealing 13 exist
Do not have endless groove 18 on the inside of axis direction, therefore, main lip 16 does not have relatively thin flexible part 19.It will be filled below in axis direction both sides
Rolling bearing equipped with sealing element 20B shown in Fig. 5 (B) is known as " comparative example 2 ".
Sealing elements 6 of the sealing element 20C relative to present embodiment shown in Fig. 5 (C), the thick wall portion 13A of sealing 13 is not
With the endless groove 18 on the inside of axis direction, endless groove 25 is instead formed on the outside of the axis direction of sealing 13.Therefore, with it is interior
The main lip 16 of the peripheral surface 2A contacts of circle 2 does not have relatively thin flexible part 19, is not contacted with the peripheral surface 2A of inner ring 2 instead
Assist lip 15 that there is relatively thin flexible part 26.The rolling of sealing element 20C shown in Fig. 5 (C) will be installed in axis direction both sides below
Dynamic bearing is known as " comparative example 3 ".
The rolling bearing 1 and comparative example 1~3 of present embodiment are all set as the deep trouth ball that internal diameter is 3mm, outer diameter is 8mm
Bearing carries out torque rating experiment below and dust test in order to evaluate sealing performance to them.
(1) torque rating is tested
The torque of each bearing is measured to rolling bearing 1 and comparative example 1~3 using measurement device M shown in fig. 6.Such as Fig. 6 institutes
Show, each bearing W that 2 are tested is set as 1 set by measurement device M, and the outer ring of each bearing W is inserted into, is embedded in cylindrical shape
The both ends inner circumferential of shell H will be inserted by the axis S of driving motor rotation driving, be embedded in inner ring, F=is being imparted to inner ring
Axis S is set to be rotated with the speed of 10000rpm in the state of the preload Fa of 2N.Then, by using the measurement of load cell
Machine R measures the tangential force for acting on the shell H for being installed in outer ring, based on the tangential force determined, calculates 2 each bearings
Torque.The torque of calculated 2 bearings divided by 2 are removed and obtain the torque of 1 bearing.The measurement of torque room temperature, often it is wet
In the environment of carry out, calculate and 10 average value measured to each bearing, by the way that comparative example 1 (standard items) is set as benchmark
(100) relative value indicates torque.Lower than the torque of comparative example 1, i.e. lower than 100 is preferred.
The measurement result of torque is shown in Fig. 7.
(2) dust test
In dust test, the rolling bearing 1 of present embodiment and comparative example 1~3 are hung on into drying by rope respectively
In device, dust circulation is made 1 hour by fan electromotor in drier.Dust uses the JIS experiments according to JIS Z 8901 to use
Powder 1 (8 kinds of Northeast soil (Off East ロ ー system)).Dust test is measured by Andrew's measuring instrument (ア Application デ ロ ン メ ー タ)
Front and back Andrew's value carries out the sound equipment evaluation of the ascending amount based on Andrew's value before and after dust test.At this point, Andrew's value
Ascending amount it is smaller, indicate seat ring face it is smaller by the roughening degree of dust, the entrance that can be evaluated as dust is less.
The sound equipment evaluation of dust test carries out under M frequency bands (300~1800Hz) and H frequency bands (1800~10000Hz).Dust is tried
The result tested is shown in Fig. 8.
The result of torque rating experiment shown in Fig. 7 and the result of dust test shown in Fig. 8 are known as below.This reality
The rolling bearing 1 of mode is applied compared with comparative example 1 (standard items), torque is low, the ascending amount of Andrew's value it is low (entrance of dust compared with
It is few).For comparative example 2 compared with comparative example 1, the ascending amount of Andrew's value is low (entrance of dust is less), but torque is high.Comparative example 3
Compared with comparative example 1, torque is low, but the ascending amount of Andrew's value is high (entrance of dust is more).
The rolling bearing 1 of present embodiment is formed soft by endless groove 18 are arranged between main lip 16 and thick wall portion 13A
Property portion 19, the contact opposite with the peripheral surface 2A of inner ring 2 of main lip 16 can be made to decline and reduce resistance to sliding.Therefore,
Torque can be inhibited relatively low.In addition, in 15 side of auxiliary lip, endless groove as the sealing element 20C without comparative example 3
25, so can ensure the rigidity of auxiliary lip, dust is inhibited to enter.
In addition, in the above-described embodiment, to securing sealing element 6 on outer ring 3 the case where illustrates, but the present invention
It's not limited to that, as shown in figure 9, can equally be suitable for fixing seals 6 on inner ring 2 the case where.In this case, exist
The seal groove 8 of fixing seals 6 is set on inner ring 2, the inner peripheral surface 3A of outer ring 3 is set as barrel surface, sealing element 6 is by fitting portion 12
It is formed in inner circumferential side, sealing 13 is formed in peripheral side, relative to the inner peripheral surface 3A of outer ring 3, auxiliary lip 15 is set as having
Minim gap is without contacting and making main lip 16 to contact.In fig.9, relative to embodiment shown in Fig. 1 to Fig. 4, for right
The part answered assigns same reference numerals.
In addition, in the above-described embodiment, ball bearing is illustrated as an example, but the present invention is not limited to
This, equally can also be suitable for other rolling bearings such as roller bearing.
Claims (5)
1. a kind of rolling bearing sealing element, which is fixed in the outer ring of rolling bearing with sealing element, right
It is sealed between inner ring and outer ring, which is characterized in that
Including：The cricoid core extended between the inner ring and outer ring, and cover at least part of elastic component of the core；
There is the elastic component sealing, the sealing to cover in the axis direction of the rolling bearing of the inner peripheral portion of the core
Inner surface and outer surface；
The sealing has a thick wall portion, the part of the outer surface of the thick wall portion than covering the core is thick and covering described in
The inner surface of core；
In the inner peripheral portion of the sealing, it is formed with：Peripheral surface relative to the inner ring has gap and discontiguous auxiliary
Lip, and in the main lip contacted with the peripheral surface of the inner ring on the inside of axis direction than the auxiliary lip；
Between the thick wall portion and the main lip of the sealing, it is equipped with the endless groove of axially inside opening, in institute
The base portion for stating main lip is formed with the flexible part of thin-walled.
2. a kind of rolling bearing sealing element, which is fixed in the inner ring of rolling bearing with sealing element, right
It is sealed between inner ring and outer ring, which is characterized in that
Including：The cricoid core extended between the inner ring and outer ring, and cover at least part of elastic component of the core；
There is the elastic component sealing, the sealing to cover in the axis direction of the rolling bearing of the peripheral part of the core
Inner surface and outer surface；
The sealing has a thick wall portion, the part of the outer surface of the thick wall portion than covering the core is thick and covering described in
The inner surface of core；
In the peripheral part of the sealing, it is formed with：Inner peripheral surface relative to the outer ring has gap and discontiguous auxiliary
Lip, and in the main lip contacted with the inner peripheral surface of the outer ring on the inside of axis direction than the auxiliary lip；
Between the thick wall portion and the main lip of the sealing, it is equipped with the endless groove of axially inside opening, in institute
The base portion for stating main lip is formed with the flexible part of thin-walled.
3. rolling bearing sealing element according to claim 1 or 2, it is characterised in that：
Between the surface in the outside in the axis direction of the rolling bearing of the front end of the auxiliary lip and the auxiliary lip have
Gap and the angle of inclination between the peripheral surface of the discontiguous inner ring or the inner peripheral surface of the outer ring, before the auxiliary lip
The surface of inside in the axis direction of the rolling bearing of end is discontiguous described with gap with the auxiliary lip
Angle of inclination between the peripheral surface of inner ring or the inner peripheral surface of the outer ring is small.
4. according to the rolling bearing sealing element described in arbitrary 1 of claims 1 to 3, it is characterised in that：
Touched with the main lipped joint described in the surface of inside in the axis direction of the rolling bearing of the front end of the main lip
Angle of inclination between the peripheral surface of inner ring or the inner peripheral surface of the outer ring, than the rolling bearing of the front end of the main lip
Axis direction on outside the inner peripheral surface of the peripheral surface of the inner ring or the outer ring that is contacted with the main lip of surface it
Between angle of inclination it is small.
5. a kind of rolling bearing, it is characterised in that：
It is installed with the rolling bearing sealing element described in arbitrary 1 according to claims 1 to 4.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017063672 | 2017-03-28 | ||
| JP2017-063672 | 2017-03-28 | ||
| JP2017-246398 | 2017-12-22 | ||
| JP2017246398A JP7112201B2 (en) | 2017-03-28 | 2017-12-22 | Rolling bearing seals and rolling bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108662026A true CN108662026A (en) | 2018-10-16 |
| CN108662026B CN108662026B (en) | 2021-07-30 |
Family
ID=63669143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810257396.6A Active CN108662026B (en) | 2017-03-28 | 2018-03-27 | Seal for rolling bearing and rolling bearing |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US10458477B2 (en) |
| CN (1) | CN108662026B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114080514A (en) * | 2019-06-21 | 2022-02-22 | 美蓓亚三美株式会社 | Bearing monitoring device and bearing monitoring method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7281422B2 (en) * | 2020-01-15 | 2023-05-25 | 株式会社シマノ | fishing reel |
| IT202000015814A1 (en) * | 2020-07-01 | 2022-01-01 | Skf Ab | SEAL FOR BEARING UNIT |
| IT202000024160A1 (en) * | 2020-10-14 | 2022-04-14 | Skf Ab | SEAL FOR BEARING UNITS WITH OPTIMIZED ANCHORAGE |
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| JP2010138931A (en) * | 2008-12-09 | 2010-06-24 | Ntn Corp | Sealed rolling bearing |
| JP2011085247A (en) * | 2009-10-19 | 2011-04-28 | Thk Co Ltd | Motion guiding device |
| JP6331754B2 (en) * | 2013-07-09 | 2018-05-30 | 日本精工株式会社 | Ball bearing with seal ring |
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| JP2005163900A (en) * | 2003-12-02 | 2005-06-23 | Koyo Seiko Co Ltd | Rolling bearing |
| CN1724889A (en) * | 2004-05-21 | 2006-01-25 | Skf公司 | Rolling bearing seal device |
| JP2008151164A (en) * | 2006-12-14 | 2008-07-03 | Nsk Ltd | Seal for bearing, bearing and forming die |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114080514A (en) * | 2019-06-21 | 2022-02-22 | 美蓓亚三美株式会社 | Bearing monitoring device and bearing monitoring method |
| CN114080514B (en) * | 2019-06-21 | 2024-03-29 | 美蓓亚三美株式会社 | Bearing monitoring device and bearing monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| US20180283455A1 (en) | 2018-10-04 |
| CN108662026B (en) | 2021-07-30 |
| US10458477B2 (en) | 2019-10-29 |
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